Petalocrinus Mirabilis (N. Sp.) and a New American Fauna

Weller, Stuart; Davidson, A. D.

doi:10.1086/607463

Cited by 8 publications

(12 citation statements)

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“…Type species. Petalocrinus mirabilis Weller and Davidson, 1896, p. 167, by original designation (Moore et al . 1978 b , p. T594).…”

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confidence: 99%

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New Crinoids (Echinodermata) From the Llandovery (Lower Silurian) of the British Isles

Fearnhead¹,

Donovan²

2007

Palaeontology

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“…Type species. Petalocrinus mirabilis Weller and Davidson, 1896, p. 167, by original designation (Moore et al . 1978 b , p. T594).…”

mentioning

confidence: 99%

“… Reconstruction of Petalocrinus mirabilis Weller and Davidson, 1896 in rheophilic feeding posture (after Bather 1900, fig. 91.1; Ubaghs 1953, fig.…”

mentioning

confidence: 99%

New Crinoids (Echinodermata) From the Llandovery (Lower Silurian) of the British Isles

Fearnhead¹,

Donovan²

2007

Palaeontology

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“…Superfamily Gasterocomacea Roemer, 1854 Family Petalocrinidae Weller and Davidson, 1896 Remarks.-According to Mao et al (2015), the Petalocrinidae has a relatively small aboral cup with arms, each presumably a series of fused brachials. These specialized arm plates are robust and can be transported as isolated plates after death.…”

Section: Systematic Paleontologymentioning

confidence: 99%

“…Research on Silurian Petalocrinidae began more than one century ago with studies in Iowa (Weller and Davidson, 1896) and Sweden (Bather, 1898). The key defining feature for the family is the presence of fused arm plates.…”

Section: Introductionmentioning

confidence: 99%

New taxa and phyletic evolution of the Aeronian (Llandovery, Silurian) Petalocrinidae (Echinodermata, Crinoidea) in Guizhou, South China Block

Mao

Ausich

et al. 2017

J. Paleontol.

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Abstract.-Systematic paleontology of three new species of Petalocrinidae (Crinoidea) are documented from the carbonate-dominated units of the Shihniulan and equivalent Leijiatun formations (Llandovery, Silurian) of the Baisha, Fengxiang, and Shuibatang sections in Guizhou (China). New taxa are from the Upper Yangtze Epicontinental Sea of the South China Block. The new taxa include Petalocrinus stenopetalus new species, Spirocrinus circularis new species, and S. dextrosus new species. They have a narrow spatial and temporal (Aeronian) distribution. Evolutionary patterns of the four genera of Petalocrinidae are outlined based on the specialized characters of the fused arm plates. Phylogenetic analysis was used to assess morphological relationships within the Petalocrinidae. Petalocrinus inferior represents the plesiomorphic condition for the group and nests as a sister group of P. stenopetalus n. sp. and the Spirocrinus species used in this analysis and the clade exclusively comprised of Sinopetalocrinus. The phylogenetic analysis suggests that Petalocrinus, as currently defined, might be a paraphyletic genus.

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“…Bather (Bather, 1898), but their affinity was sufficiently problematic that he did not discuss them in his 1893 study (see Bather, 1893). With the description of Petalocrinus mirabilis Weller and Davidson (1896) (in the new genus Petalocrinus), the anatomy of this most unusual crinoid was finally understood. In addition to isolated fan-shaped plates,…”

Section: Introductionmentioning

confidence: 99%

Chinese origin and radiation of the Palaeozoic crinoid family Petalocrinidae

Mao

Lin

et al. 2015

Palaeoworld

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The Ordovician to Devonian family Petalocrinidae includes 28 species belonging to 5 genera. This family is unique because the arm plates are fused into a large fan or cylinder. Paleobiogeographic occurrences of this family include Laurentia, Baltica, Avalonia, South China, Sibumasu, and Perunica blocks. The family has the oldest petalocrinids from China. An early radiation of this clade resulted in three genera during the Llandovery of China. Petalocrinus became cosmopolitan during the Llandovery and Wenlock, and the youngest genus is present in the Lower Devonian of the Czech Republic. Taxonomic determination for the Petalocrinidae is based on the fused arm plates instead of cup plates. The diverse morphology of these arm plates suggests a variety of aerosol suspension-feeding modes may have been used by petalocrinids.

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Petalocrinus Mirabilis (N. Sp.) and a New American Fauna

Cited by 8 publications

References 0 publications

New Crinoids (Echinodermata) From the Llandovery (Lower Silurian) of the British Isles

New Crinoids (Echinodermata) From the Llandovery (Lower Silurian) of the British Isles

New taxa and phyletic evolution of the Aeronian (Llandovery, Silurian) Petalocrinidae (Echinodermata, Crinoidea) in Guizhou, South China Block

Chinese origin and radiation of the Palaeozoic crinoid family Petalocrinidae

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